Valve just showed E3 attendees an awesome teaser trailer for Portal 2. Too bad the game has been pushed back, beyond its regularly scheduled due date. Anyway, check out the teaser shown at Sony's E3 keynote. It's definitely something to look forward to in 2011.

Well, turns out the rumor mill was on par this time around. Team Fortress 2, one of the biggest multiplayer first-person franchises (and named one of the funnest games by our sister magazine, PC Gamer), is now available to Mac gamers everywhere.

TF2 will feature Steam Play just like all of the other Valve titles, so if you've already purchased it for the PC platform it should be available to you right now.

Though we've only had Steam for a few weeks, by now the lot of. us have undoubtedly played through Portal's incredibly addicting storyline and figured out that the cake really isn't a lie. Unfortunately, computer gamers everywhere will have to wait even longer to get another slice of cake, as Valve doesn't plan on releasing the sequel until 2011.

Valve’s seminal shooter series brilliantly blends platforming and puzzle solving into its action. Sadly, most folks are still waiting for a conclusion to the killer cliffhanger at the end of the second pseudo-sequel, Half-Life 2: Episode 2. Fortunately, Mac gamers have plenty of catching up to do. Half-Life 2 is a pretty straightforward first-person shooter, but it has some nitty gritty stuff worth knowing. Check it out after the cut!

It's the moment you've all been waiting for, Apple faithful. Valve's digital distribution client, Steam, is now officially live for the Mac OS X operating system. If you'd rather skip the story and get to downloading the application, click to get the link after the jump.

Unlike anything we’ve ever played, Portal’s brilliant, mind-bending platforming is the pinnacle of puzzle games. Some may scoff at its brevity (it’s only three or four hours long) but it’s so clever and cool that you’ll want to experience it again, if only to see what layers of depth you missed. There are enough spoilery distractions along the way that you probably won’t catch ‘em all. Keep these tips in mind while, ahem, doing what you do in Portal.